Flexible vane pump for outboard motors



Feb. 1, 1949. L. T. KINCANNON 2,460,421

FLEXIBLE VANE PUMP FOR OUTBOARD MOTORS Filed June 22, 1946 11v vzwroa ATTORNE Y Patented Feb. 1, 1949 g I FLEXIBLE VANE PUMP FOR OUTBOARD MOTORS Leo T. 'Kincannon, Milwaukee, Wis., assignor to Metal Products Corporation, Milwaukee, Wis., a corporation of-Wisconsin v Application June 22, 1946, Serial No. 678,657

4 Claims. Cl. 103-117) The invention relates to vane type rotary pumps and more particularly to that type of pump in which the impeller is of the flexible vane type;

One of the objects of the invention is to provide a pump of the character above described in which the pump housing has a circular bore and is provided with a separate tubular liner, 8. portion of which is flattened to provide a region in which the vanes of the pump are flexed to expel the fluid through the outlet of the pump. This permits ready machining of the pump housing and the use of a different kind of metal for the pump liner, and one in some instances more appropriate for the yielding material, such as rubber, of which the impeller is made.

A further object of the invention is to provide an end plate having a keyed connection with the pump housing which has a threaded connection with the outlet support, so that regardless of the angular position of said housing whenscrewed into place the outlet in said end plate will always be in the proper position relative to the inlet in said housing.

A further object of the invention is to provide a cooling water pump for'outboard motors in which the pump housing may be mounted on the propeller housing and the impeller mounted on the propeller drive shaft, and the propeller hub may overlap the front end of the housing to provide a streamline connection therewith.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig. 1 is an elevation view looking into the pump housing as viewed along the line 3-3 of Fig. 2; parts being broken away;

Fig. 2 is a vertical sectional view taken along the broken line A-A of Fig. 1;

Fig. 31s a view similar to Fig. 2 showing the pump housing and its cover plate.

Referring to the drawing, the numerali designates a portion of a propeller drive shaft housing for an outboard motor having a threaded tubular end 6, a shouldered bore '1, and an annular chamber 8 formed therein provided with an outlet 9.

The propeller drive shaft It) extends through a bearing H and a packing washer l2 mounted in the bore I.

A cylindrical cup-shaped pump housing It is provided with a closed end It through which the shaft l0 extends and has a cylindrical bore l5 and a threaded bore it formed therein. The

2 end of said housing is provided with 'aseries of fluid inlet slots l1, and the body is recessed at l8, so that the hub (not shown) of the propeller may overlap the same in spaced relation therewith so as to provide a streamlined arrangement.

A tubular liner member'l9 of brass, bronze, or other suitable material closely fits within the bore I5 except for a portion 20 of its circumference which. is flattened, as shown in Fig. 1, to

provide a surface which at this point reduces.

the volume of the chamber 2| formedby said housing, liner, and a removable cover plate 22 which abuts the inner edge 23 of said liner.

Within the chamber 2! and suitablykeyed to the shaft I0 is a vane type impeller 24 formed of suitable rubber composition or other suitable flexible material whose vanes 25 are capable of flexing relative to each other so as to reduce the space betweenthem and thus provide a contractible chamber from which the fluid taken in between the vanes from the inlet I1 is expelled through an outlet opening '26 in the plate 22 as said vanes are flexed by their engagement with the flattened portion 20 of the liner, as shown in Fig. 1.

The cover plate 22 is'clamped in operative position between the edge 23 of the liner and the face 21 of the propeller housing 5 when said housing I3 is screwed up onto the threaded portion of said housing 5 and in order that the outlet 26 in said plate will always be properly registered with relation to the inlet I! in said housing I3, said plate 22 has a key 28 registering with a key slot 29 in said housing l3.

The housing I3 may also be provided with slots 30 for engagement by a suitable spanner wrench to turn it into place.

The shaft I0 is continuously rotated by the motor for the outboard motor unit, and the water expelled from the pump is delivered to the chamber 8 and thence to the outlet 9 which connects by suitable piping (not shown) with the jacket space of the motor.

While the pump has been described with particular reference to its use on outboard motors, it will be obvious that its use is not to be restricted thereto as the housing 5 may be the relatively fixed housing of a fluid pump used for other purposes in which instance the end of the shaft Ill would not ,necessarily project through the end It of the housing I3.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of except in so far as such limitations are included in the claims.

What I claim as my invention is:

1. In a pump of the character described, the combination of a housing having a cylindrical cavity having an inlet in its bottom wall, a tube forming a flxed imperforate liner for the side walls of said cavity except for a flattened portion spaced from said walls, said pump having a plate abutting said liner and having an outlet in the region of said flattened portion, means for clamping said plate and liner in assembled position, and a rotor centrally, mounted in said cavity and having .a plurality of flexiblevanes mounted to rotate in said housing and cooperating with said inlet and outlet.

2. In a pump of the character described, the

combination of a member having a cylindrical threaded end provided with a central bore and an annular chamber provided with. an outlet, a pump housing having a pump chamber and a threaded bore fitting the threaded end of said member, a drive shaft :lournalled in said central bore, an impeller having flexible vanes working in said pump chamber and operatively connected to said drive shaft, said pump housing having an inlet, and an end plate having a keyed connection with said housing and abutting the threaded end of said member and clamped thereagainst by a part of said housing when said housing is screwed onto said member and having an outlet registering with said annular chamber.

3. In a pump of the character described, the combination of a member having a cylindrical threaded end provided with a central bore and an. annular chamber provided with an outlet, a housing having a cylindrical cavity, an inlet and a threaded bore in the housing fitting the threaded end of said member, a tube forming a liner for the side walls of said cavity except for a flattened portion spaced from said walls. a drive shaft journalled in said central bore, an impeller mounted on said drive shaft and having flexible vanes engaging said liner, and an end plate having a non-rotatable connection with said housing 4 and clamped between the edge oi said liner and the face of the threaded end of said member and having an outlet in the region of said flattened portion of the liner and registering with said 5 annular chamber in any angular position of said housing relative to said member.

4. In apump of'the character described, the combination of a member having a cylindrical threaded end provided with a central bore and an annular chamber provided with an outlet, a pump housing having a pump chamber and a threaded bore fitting the threaded end of said member, a drive shaft iournalled in said central bore, an impeller having flexible vanes working in said pump chamber and operatively connected to said drive shaft, said pump housing having an inlet, and a reversible end plate having a keyed connection with said housing and abutting the threaded end of said member and clamped thereagainst by a part of said housing when said housing is screwed onto said member and having an outlet registering with said annular chamber and diametrically disposed relative to said keyed connection.

LED '1. KDICANN ON.

REFERENCES CITED 1 The following references are of record in the die of this patent:

UNITED s'ra'ra's m'rrm'rs Number Name Date 763,525 Van Beresteyn June 28, 1904 1,190,139 Ford July 4, 1916 1,943,561 Staley Jan. 16, 1934 2,153,626 Kissel .Apr. 11, 1939 1,189,356 Briggs Feb. 6, 1940 2,212,939 Irgens Aug. 27, 1940 2,293,268 Quiroz Aug. 18, 1942 40 2,308,742 Brown et al. Jan. 19, 1945 2,383,153 Parsons Aug. 21, 1945 FOREIGN PATENTS Number Country Date 9,411 Great Britain 1942 

